JoAnn Manson, MD, MPH, DrPH, Brigham & Women’s Hospital, Boston, MA, discusses research from the VITAL (vitamin D and omega-3 in the prevention of autoimmune diseases) trial. Vitamin D led to a significant 22% reduction in the risk for a composite of autoimmune disorders. When compared with a reference group who received placebos for vitamin D and omega-3s, the reduction in composite autoimmune diseases was greater than 30% with vitamin D.

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